915resolution

Derek Broughton news at pointerstop.ca
Tue Sep 19 14:02:52 BST 2006


O. Sinclair wrote:

> Dear Derek, I have always found top-posting easier to read and deal with
> but will follow your wish. The rest of my reply is then at the end of this
> mail

It's not easier if you're going to have a conversation.  It's convenient for
businesses that will treat email as being exactly like an exchange of
letters - where each letter gets attached to the end.  Top-posting on
usenet will mostly just get you ignored.  otoh, quoting 200 lines and then
putting an answer at the end isn't very helpful either. 
> 
> On 18/09/06, Derek Broughton <news at pointerstop.ca> wrote:
>>
>> OK, first, where did all these come from?  You don't have vsyncs of 72 &
>> 75 on an LCD monitor.  You only need the 60Hz values.

I'm not sure whether you answered this.  In any case, try removing ALL of
those modelines.
>>
>> >   modeline  "1280x1024 at 75" 135.0 1280 1296 1440 1688 1024 1025 1028
>> > 1066 +hsync +vsync
>> >   modeline  "1280x960 at 60" 102.1 1280 1360 1496 1712 960 961 964 994
>> > -hsync +vsync
>>
>> Do you have a widescreen model?  Dell widescreens are 16:10 ratio, normal
>> screens are 4:3.  1280x960 isn't either, so again probably not necessary.

You _definitely_ didn't answer this.

>> >   DefaultDepth 24
>> >   DefaultDepth 16
>>
>> These can't both be right - but I'm not sure which takes precedence.  I'd
>> be
>> prepared to bet that it's the "16" value, because then you don't have any
>> modes specified!

You haven't indicated that you've done anything about this...
>>
>> >     virtual 1920 1440
>>
>> Do you know what that does?  If not, you'll probably want to get rid of
>> it.

or this...

>> >     modes "1280x1024 at 75" "1280x960 at 60" "1152x864 at 75" "1280x1024 at 60"
>> > "1024x768 at 60" "1280x960 at 75" "1024x768 at 70" "1400x1050 at 60" "1024x768 at 75"
>> > "1400x1050 at 75" "832x624 at 75" "1600x1200 at 65" "800x600 at 60" "1600x1200 at 60"
>> > "800x600 at 75" "1600x1200 at 70" "800x600 at 72" "1792x1344 at 60" "640x480 at 75"
>> > "1856x1392 at 60" "640x480 at 72" "1920x1440 at 60" "640x480 at 60"
>> >   EndSubSection
>> > EndSection
>>
>> It's much simpler to get rid of most of that.  My xorg.conf, which _does_
>> support widescreen, simply has:
>>
>> Section "Monitor"
>>         Identifier      "Laptop Monitor"
>>         Option          "DPMS"
>>         # 1280x800 @ 60.00 Hz (GTF) hsync: 49.68 kHz; pclk: 83.46 MHz
>>         Modeline "1280x800_60"  83.46  1280 1344 1480 1680  800 801 804
>> 828  -HSync +Vsync
>>         HorizSync       45.0 - 51.0
>>         ModelName       "LCD Panel 1280x800"
>> EndSection
>>
>> Section "Screen"
>>         Identifier      "Default Screen"
>>         Device          "Intel Video Card"
>>         Monitor         "Laptop Monitor"
>>         DefaultDepth    24
>>         SubSection "Display"
>>                 Depth           24
>>                 Modes           "1280x800_60" "1024x768"
>>         EndSubSection
>> EndSection
>>
>> You shouldn't need any modelines for standard resolutions - pretty well
>> anything at 4:3 ratio - I doubt you even need a Modeline in the screen
>> section for 1280x1024.  The default resolutions are simply specified
>> as "1280x1024" instead of "1280x1024 at 60" or "1280x1024_60".
>>
> I don't really UNDERSTAND this xorg.conf thing, OK. So am very happy for
> support but please don't expect me to try and explain HOW the stuff got
> there. I simply changed the monitor setting to Dell Laptop 1400 * 1050 in
> "Display" settings Hardware settings

What?  Where?

> and that is what came it out of it. 
> the "gtf 1400 1050 60" gives this output;
> "1400x1050 @ 60.00 Hz (GTF) hsync: 65.22 kHz; pclk: 122.61 MHz
>   Modeline "1400x1050_60.00"  122.61  1400 1488 1640 1880  1050 1051 1054
> 1087  -HSync +Vsync"
> 
It's still unclear whether you really want 1400x1050, 1280x1024 or both.  In
any case, why don't you start with a _minimal_ xorg.conf.  No "Modeline"
lines in the Monitor section, just the one Display subsection and only the
Modes you actually care about - there's no point in having 1280x960 if
you're never going to use it.  Specify Modes as:

       Modes  "1400x1050" "1280x1024" "1024x768"

and any other sizes you really care about.  Restart X.  If you have any
modes that aren't working, _then_ try adding the output from gtf for that
resolution to the monitor section.  Change the Modes value, for that
resolution to include the _60 (ie, Modes "1400x1050_60" "1280x1024"...)
that's provided by gtf.
-- 
derek




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